A bus moves at 36 km h and a train moves at 15 m s . Find the ratio of their speeds.

Given, Speed of bus = 36 km / hr Speed of train = 15 m / s We know that, 1 km / hr = 5 18 m / s 36 km / hr = 36 × 5 18 m / = 10 m / s Ratio of speeds = Speed of bus Speed of train = 10 15 = 2 3 = 2 : 3 Hence, the ratio of their speeds is 2 : 3

Karan runs from 4 . 50 pm to 5 . 20 pm at an average speed of 7 km h . How far did he go?

Given, Time = 5 . 20 pm - 4 . 50 pm = 30 mins = 30 60 hours = 1 2 hours Speed = 7 km / hr Distance travelled = S × T = 7 × 1 2 = 7 2 km = 3 . 5 km

A car covers 210 km in 3 1 2 hours. Calculate its speed.

Given, Distance of the car = 210 km Time taken by the car to cover the distance = 3 1 2 hours = 7 2 hours We know that, Speed = Distance Time Speed = 210 7 2 = 210 30 7 × 2 1 = 60 km / hr Hence, the speed is 60 km / hr .

A train is moving with a speed of 78 km h . How much distance will it cover in 2 hours 10 minutes?

Given, The speed of the train = 78 km / hr Time taken by the aeroplane to travel the distance = 2 hours 10 minutes = 2 10 1 60 6 = 13 6 hours We know that, Distance = Speed × Time Distance = 78 13 × 13 6 = 169 km Hence, the distance is 169 km

A boat is moving with a speed of 7 . 5 m s and crosses a river in 20 minutes. What is the width of the river?

Given, Speed of the boat = 7 . 5 m / s = 7 . 5 × 18 5 = 27 km / hr Time taken by the boat = 20 minutes = 20 60 hours = 1 3 hours We know that, Distance = Speed × Time Distance = 27 × 1 3 = 9 km Hence, the distance is 9 km .